123256938043 has 2 divisors, whose sum is σ = 123256938044. Its totient is φ = 123256938042.

The previous prime is 123256938031. The next prime is 123256938097. The reversal of 123256938043 is 340839652321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123256938043 - 2⁵ = 123256938011 is a prime.

It is a super-3 number, since 3×123256938043³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123256937984 and 123256938002.

It is not a weakly prime, because it can be changed into another prime (123256938143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61628469021 + 61628469022.

It is an arithmetic number, because the mean of its divisors is an integer number (61628469022).

Almost surely, 2^123256938043 is an apocalyptic number.

123256938043 is a deficient number, since it is larger than the sum of its proper divisors (1).

123256938043 is an equidigital number, since it uses as much as digits as its factorization.

123256938043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 123256938043 in words is "one hundred twenty-three billion, two hundred fifty-six million, nine hundred thirty-eight thousand, forty-three".